Finns to bury nuclear waste in world's costliest tomb

Deep underground on a lush green island, Finland is preparing to bury its highly-radioactive nuclear waste for 100,000 years — sealing it up and maybe even throwing away the key. Tiny Olkiluoto, off Finland’s west coast, will become home to the world’s costliest and longest-lasting burial ground, a network of tunnels called Onkalo — Finnish for “The Hollow”. Countries have been wrestling with what to do with nuclear power’s dangerous by-products since the first plants were built in the 1950s.